Back to EveryPatent.com
United States Patent | 6,138,132 |
Lee ,   et al. | October 24, 2000 |
A high speed ROM-based Nyquist FIR filter which is capable of enhancing a modulation speed without increasing the operational frequency of the filter by overcoming the problems encountered in the conventional digital modulation ROM-based FIR filter. Therefore, it is possible to increase the modulation speed by the interpolation ratio without increasing the operational frequency of the filter compared to the method of using a conventional FIR filter using one ROM. Accordingly, the high speed ROM-based Nyquist FIR filter according to the present invention is well adaptive to the modulation FIR filter of a broadband digital communication which requires a high speed data processing capability.
Inventors: | Lee; Seong Bong (Daejeon, KR); Kang; In (Daejeon, KR); Yeon; Kwang Il (Daejeon, KR); Kim; Kyung Soo (Daejeon, KR) |
Assignee: | Electronics and Telecommunications Research Institute (Daejeon, KR); Korea Telecom (Seoul, KR) |
Appl. No.: | 097804 |
Filed: | June 16, 1998 |
Jun 16, 1997[KR] | 97-24949 |
Current U.S. Class: | 708/313; 708/319 |
Intern'l Class: | G06F 017/10 |
Field of Search: | 708/313,319 375/298 |
5285479 | Feb., 1994 | Iwane | 375/298. |
5379242 | Jan., 1995 | Rose et al. | 708/319. |
5487089 | Jan., 1996 | Misaizu et al. | 708/319. |
5966314 | Oct., 1999 | Lee | 708/313. |